Hey camrich22,
Good to hear from you.
I have never used the 24-105 but from what I read it's a GREAT lens. If our kit needed this lens I would really have a good look. It seems a lot of photographers like this lens.
I can relate how you like the 70-200, we use the 2.8 and find it is tack sharp and VERY versitile/robust. A lens we would NEVER give up.
Happy shooting and be safe..
Chris...